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Use your iDevice as an extra display for your Mac

182 points by bauerpl 12y ago

joshcrowder 12y ago
This looks cool - I'd definitely use it for emails. Has it not been done already though? I have a question about the image - whats the stand used for the iPad?
- deleted 12y ago
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- simi_ 12y ago
  https://www.twelvesouth.com/product/compass2 https://www.twelvesouth.com/product/compass2 12 south are pretty nice, but my wife had a bad experience with their SurfacePad iPhone case (really awesome case, but the leather wears heavily after 1-2 months)
  - jrockway 12y ago
    Isn't the point of leather that it wears?
- andystanton 12y ago
  Regarding it being done before, I tried this app (http://minidisplayapp.com/userguide/en/ http://minidisplayapp.com/userguide/en/) that offered similar with an iPad mini, but the extra space wasn't really big enough to make it worthwhile.
PinguTS 12y ago
It is called AirDisplay and available since years: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ I think there was/is also another App available doing it.
- petertheface 12y ago
  There are plenty of apps which have done this before - but only over Wifi. This is wired, so you don't get the same issues with lag.
- shadowmint 12y ago
  ...and then yosemite came out, the the fps dropped from 25 to 2, and everyone stopped using it. The same goes for DisplayPad. The key here is that this is not a wifi streamcast.
- hinkley 12y ago
  I've used Air Display, but that's over Wifi. These guys claim to be using the lightning cable. Which means maybe, just maybe, I can plug two of them in at once.
drinchev 12y ago
I wonder how they achieve "Zero lag". I've been using similar software ( AirDisplay [1] ) and the lagging is awful. You have to be certified hardware manufacturer if you want to use the USB connection to transmit any data between the iPad and your Mac [2]. So my bet is they either use WiFi ( which can roughly get 60fps on retina resolution ) or Bluetooth 4. In both cases I think the refresh rate would not satisfy in a lot of cases, e.g. playing a YouTube video through their software on the iPad. 1: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ 2: https://avatron.com/support/faq-air-display/#toggle-id-13 https://avatron.com/support/faq-air-display/#toggle-id-13 EDIT: I've found more information on their facebook page [3] > To setup, download and open duet on your Mac (for free) and on iOS. > Connect your device using a lightning or 30 pin cable. Done. > No need to worry about firewall settings, Wi-Fi speed or your 802.11n network. > Duet is secure, simple, and allows you to use your iOS and OS X devices in harmony. So I guess I was wrong with my bets. Maybe they got a hardware manufacturer license from Apple. Anyway launch is on 16th, so let's see. 3: https://www.facebook.com/duetdisplay/info?tab=page_info https://www.facebook.com/duetdisplay/info?tab=page_info
- deleted 12y ago
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- darylteo 12y ago
  http://www.businessinsider.com.au/duet-display-app-turns-ipad-into-second-screen-2014-12 http://www.businessinsider.com.au/duet-display-app-turns-ipa... Has a review
  - fuzzywalrus 12y ago
    "Most importantly, Duet Display is the first app that actually turns your iPad into a second display I’d actually like to use. As someone who has tried Air Display and uninstalled it shortly afterward, frustrated, I can honestly say this is the only option that’s worth it." Interesting, I tried Air Display and (another app) ages ago and used it off and on. It was "neat" and worked well as my Terminal window but a very poor stand for a monitor. Looks like I'll be dusting off my iPad 2.
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furyg3 12y ago
If it is really real-time this will be interesting. In combination with SideCar you could have a nice mobile dual-screen setup. http://www.cultofmac.com/247700/sidecar-hangs-your-ipad-from-your-macbook-screen/ http://www.cultofmac.com/247700/sidecar-hangs-your-ipad-from...
RBerenguel 12y ago
I've occasionally used AirDisplay when doing minor HTML/CSS stuff (browser on iPad, emacs with impatient-mode on Mac) and it's useful, nice, but when doing heavier lifting lag kills it. I'll definitely be getting it tomorrow, and look forward seeing if I get to use it more or "as often as I did."
darylteo 12y ago
Wonder how much bandwidth is required to drive this... My USB3.0 port is taken by an SSD hosting virtual machines, the other is hooked to a powered hub.
- dan1234 12y ago
  Assuming the video stream is compressed (MP4?) it shouldn't take too much. We're pretty used to streaming HD over the internet, so even USB2 should be able to handle it.
blaze33 12y ago
> the first app that allows you to use your iDevice as an extra display for your Mac I stumbled upon iDisplay.com the other day. Can't recommend anything though, I'm not an apple user, I was looking for ways to replicate my android phone display in my desktop Linux.
- teddythetwig 12y ago
  Did you find anything worth using for your use case?
  - blaze33 12y ago
    Not really: I tried android-screencast [1] but had to root my phone, the framerate was terrible, lots of crashes, touch gestures not really satisfying. The other option was using genymotion, works well, but some apps can't be installed multiple times (whatsapp I'm looking at you). If anyone knows a better way to do so, thank you in advance! [1] https://code.google.com/p/androidscreencast/ https://code.google.com/p/androidscreencast/
    - ledneb 12y ago
      For a little bit I was using a Nexus 10 as a secondary display - I used Google Chrome's remote desktop to view a separate X session, with Synergy for sharing my input devices between them (which is now paid for?!). Worked great, except you couldn't see the mouse cursor on the Nexus... :( Ultimately it was more annoying than helpful. (Edit: just realised that's broadcasting in the opposite direction to what you're asking for)
    - alexhektor 12y ago
      http://web.airdroid.com/ http://web.airdroid.com/ maybe? Lots of drawbacks, though, and not 1:1 mirroring I believe, so may not fit your needs. But seems to support whatsapp via screen mirroring + custom keyboard (probably?). Haven't tested since I'm currently on iOS.
    - ibrahima 12y ago
      Koush's Mirror app[1] works alright with his Allcast Receiver Chrome app. The interesting thing is that using it actually revealed a (broken) second screen mode in one of the apps I use, didn't know Android had APIs for that. Perhaps it's intended for Chromecast/Miracast and whatever Mirror does looks like that. [1] https://play.google.com/store/apps/details?id=com.koushikdutta.mirror&hl=en https://play.google.com/store/apps/details?id=com.koushikdut...
wodenokoto 12y ago
The iAccessories pictured looks really beautiful. Anyone know what brand it is?
- ashaiber 12y ago
  Amusingly, these are sold by Evernote: https://www.evernote.com/market/feature/pfeiffer https://www.evernote.com/market/feature/pfeiffer
- xmr 12y ago
  If you like these you may also like Grovemade - http://grovemade.com http://grovemade.com. Initially I even thought it was from them.
edcastro 12y ago
Am I a little too slow here or they just launched the Mac app without the iOS counterpart? Can't find it on App Store.
- cstuder 12y ago
  You're too fast, the release date for the iOS app is 16th december.
  - edcastro 12y ago
    Ah. I see. Got a little confused because the Mac app is already available, so I thought it was just a matter of old sign up form not removed from site yet.
  - memeplex 12y ago
    Duet is still waiting in line for approval in the app store. Launch is later this week.
- alexcroox 12y ago
  The CTA at the end is to sign up for a launch email so I guess it's not ready yet.
patman81 12y ago
I would love to use this to share my Macbook screen on an iPad with a client. One screen seems to small for more than two people to share. Perhaps I could even connect multiple iPads for small presentations without a projector. All running in mirror mode.
Doctor_Fegg 12y ago
Best part of this: "All iPads." My iPad 1 is pretty much a paperweight these days (I know, I know, never buy the first version of anything Apple). This could be a great new use for it.
- happyscrappy 12y ago
  Seriously. I was going to give away my first gen ipad but due to being so outdated it seemed more of an imposition than a gift.
  - dagw 12y ago
    What's wrong with it? I have a first gen iPad and it still works fine. In fact I almost wish it would die already so that I would have a valid excuse to buy a new one.
    - happyscrappy 12y ago
      Most kids games won't run on it.
      - dagw 12y ago
        Mine is full of kids games. Admittedly I've run across one or two games that didn't work, but it's not like I've ever experienced a lack of available kids games.
        happyscrappy 12y ago
        Thanks, I will have to try it again.
    - oneeyedpigeon 12y ago
      Did you upgrade iOS to version 5? I did, and it's never been the same since. I can now barely use the web browser without it crashing. Some domains are totally unusable; appears to be related to javascript use. Low-impact sites, such as HN, are OK. Other apps (such as the app store and many games) are very prone to crashing, too. There's very little I can use it for now without getting frustrated and giving up.
MagicWishMonkey 12y ago
It would be neat if they could figure out a way to let you use an iMac screen as a secondary monitor for a mbp.
- eurleif 12y ago
  This is already built-in: http://support.apple.com/kb/PH14264 http://support.apple.com/kb/PH14264
  - MagicWishMonkey 12y ago
    Woah, do you know if this works with the new retina display iMacs?
    - michas 12y ago
      Probably not, as current Thunderbolt port is too slow to transmit enough data to drive 5k monitor.
    - eddieroger 12y ago
      At the risk of answering without a guaranteed answer, "probably not," given the amount of the power necessary to drive that screen and complex architecture inside the box to make it work. But Target Display Mode as a thing has been around for a while.
    - mkhalil 12y ago
      I'm here to confirm to you that it doesn't. Sorry buddy, wish it did myself. 5K is out of reach for most MBP's (if not all).
      - MagicWishMonkey 12y ago
        That's a bummer, it would be worth buying a new iMac for the screen alone.
    - stevep98 12y ago
      No, sorry to disappoint you! http://support.apple.com/en-us/HT3924 http://support.apple.com/en-us/HT3924
Cthulhu_ 12y ago
So uh, why is the marketing being done today when the release is tomorrow? I'll probably have forgotten about it by then. I wouldn't mind it though, the other ones (using wifi streaming) never really worked for me. And I wonder why this isn't a default feature in iOS / OSX.
- petercooper 12y ago
  So uh, why is the marketing being done today when the release is tomorrow? They want your email, Twitter following, and other things that are more useful over time than your casual perusal after launch.
  - memeplex 12y ago
    Actually a bit simpler, Business Insider released the article to fill their timeline not Duet's launch date. The app is still awaiting review and with the app store being so busy this season it's hard to give a hard date. Expected to be released later this week.
petercooper 12y ago
Duet is the first app that allows you to use your iDevice as an extra display for your Mac. What am I missing about this sentence that seems to make "the first" false in the face of things like Air Display?
- hboon 12y ago
  It's tethered using lightning cable.
DanielShir 12y ago
Finally, something to do with my 1st generation iPad.
- NietTim 12y ago
  You could have used Air Display :) I do really like this use though, never thought of using my old iPad as a permanent extra display.
NietTim 12y ago
I've been using Air Display for a long time for when I'm on the go. Does anybody have experience with both and which is better? Never really had problems with Air Display - if you don't expect it to work as a full external display. However lag has always been very manageable for me
- darylteo 12y ago
  Product launches tomorrow, so hardly any comparisons can be made. It seems to be promising - wired connection means higher bandwidth and improved latency. Supposedly can do Retina resolutions at 60hz.
  - NietTim 12y ago
    I see now, I should have been reading better - my bad. I also read in this thread that Air Display had some troubles with Yosemite, but I haven't updated on my work machine yet so I hadn't seen these problems. Streaming over USB seems promising though, I needed to plug in my iPad for the battery.
RankingMember 12y ago
Anything like this available for Windows? Wouldn't be bad for an email/IM screen.
- tmuir 12y ago
  Any VNC app allows you to view and control your screen. I like RealVNC. The corresponding app on Android and iOS is called VNC Viewer. There are several companies/projects that offer this functionality.
  - RankingMember 12y ago
    I meant adding the iPad as an additional screen (with additional desktop space) for a Windows machine.
maaaats 12y ago
Do I need an iDevice to view the video as well? Wont play here, would be interested to see more how this works.
- paraserv 12y ago
  You don't need an iOS device to watch the website's ad. It's an embedded YouTube video. Here's the direct link: https://www.youtube.com/watch?v=mVYimOiEya8 https://www.youtube.com/watch?v=mVYimOiEya8
mark_l_watson 12y ago
Wrong. I have been using my iPad as an extra display for my MacBook Air for about 2 1/2 years using the AirDisplay (getairdisplay.com). It is odd that this company would place a large lie as the first readable text.
- sigjuice 12y ago
  You did not read the whole sentence. Duet is the first app that allows you to use your iDevice as an extra display for your Mac using the Lightning or 30-pin cable. This app uses a cable. All the other apps use wifi.
  - mattdw 12y ago
    They have obviously changed the copy in the last few hours. The second half of that sentence ("Using…") was not there earlier.
    - sigjuice 12y ago
      You are right. My apologies. https://web.archive.org/web/20141215154238/http://www.duetdisplay.com/ https://web.archive.org/web/20141215154238/http://www.duetdi...
ripitrust 12y ago
I've actually just downloaded their MacOS App and tried to install and launch it. It now basically does nothing just blinking in the statues bar. But I observe sudden CPU usage surge of this app from the activity monitor, not sure whether it is because of not pairing an iOS app or not And also, my chrome feels significantly lagged.
- igrekel 12y ago
  mhm in my case once I opened the App it just disappeared. It moved itself to the Application directory, can't say I like this.
  - ripitrust 12y ago
    will it slow something down?
alexggordon 12y ago
I've been beta testing duet for about a month now. As a person that travels a lot, it's awesome. The developers have done an incredible job, and have been very responsive in fixing the bugs I've reported to them. However, a couple of things to note. Firstly, this is lag free, but still not something you should play videos on. I'm not sure what the framerate is, but I'd be surprised if it's over 30fps. I believe this is probably a result of using USB. Secondly, I never thought I'd say this, but retina is not your friend. On the new iPads, the OS X menu bar is maybe a centimeter tall. Obviously, you can change the resolution, but I like hi-res, and you just see so little when you bump it up (keep in mind the new iPad is only 1024 by 768). The app is the best it can be, but what I'd emphasize is that most people should really get a second monitor, if that's what they're looking for. I understand you could save some money, but iPads just don't offer enough real estate. Again, kudos to the devs for doing a great job on the app though.
- TazeTSchnitzel 12y ago
  They claim 60fps with no lag.
  - mistercow 12y ago
    That figure could refer to "typical" usage, where most of the screen doesn't have to update.
- cooleyandy 12y ago
  This app would be pretty useful when the new bigger iPad comes out.
kelsol 12y ago
Fantastic! Been wanting this for, like, ever
jscheel 12y ago
I know this is nit-picky, but Duet is not "the first app that allows you to use your iDevice as an extra display". It's not even the second. There's an opportunity here for better copy to differentiate themselves. Also, I've always thought this would reduce the life of your ipad. Has anyone noticed this?
- knd775 12y ago
  How? Like the display burning out or something? Maybe something battery related?
  - jscheel 12y ago
    Battery is definitely a concern, though it probably doesn't matter since it will be plugged up. The screen dimming might be a concern for me as well. Honestly though, now that I think about it, I've never been worried about that with my laptop, so I probably shouldn't care about it with my ipad.
- memeplex 12y ago
  you chopped off this part "...iDevice as an extra display for your Mac using the Lightning or 30-pin cable"
aselzer 12y ago
The line "An additional display increases productivity by up to 48%." is particularily funny. I wonder how they "measured" this. A Macbook Air 11" + extra display is quite different from a Macbook Pro 15" + extra display.
- bboreham 12y ago
  "up to".
shurcooL 12y ago
This isn't the first app that lets you do this, is it? It might be better (or worse) in performance, but the functionality has already been made available in the past, right? Just want to check. Also, this is neat but I wish it were integrated into OS X + iOS as part of AirPlay. I love AirPlay and want to see it expand to cover all possible permutations (iOS -> OS X screen/audio/both sharing, as well as OS X -> iOS screen/audio/both sharing). That would go well under the Continuity moniker and is something Apple can do well thanks to their control. Hopefully it's one of the minor new features in next Apple OS updates.
- jakejake 12y ago
  I've used an app called Air Display to do the same thing for quite a while, but instead of USB it connects over WiFi - which is convenient, but the refresh rate is slow. I used it mainly to have my chat client on a 3rd screen.
jimmyrocks 12y ago
I'd really like this to work with my old iMac G5. It has a great monitor, but I struggle to find uses for it.
ripitrust 12y ago
OK Guys After I installed and launched this MacOS app , it drastically slowed down my chrome and increased the chrome cpu usage. I am guessing something wrong with the duet app display driver. so if anyone having the same problem like mine, please go to finder, search for "duetdisplay.kext" kernal extension, delete it and reboot your Mac. It should go back to normal.
Kluny 12y ago
Here's the bit I was looking for: http://www.duetdisplay.com/#compatibility http://www.duetdisplay.com/#compatibility Compatible with all iPads, nice! I have an old iPad 1 lying around that runs very few of the apps I would like to use with it (Office suite and VLC, mostly), so I've been looking for a way to repurpose it, and this might be it.
- metanoia 12y ago
  Looks like they changed it to "All iPad hardware with iOS 6 and above". Which means no iPad 1. :(
iamhenry 12y ago
I signed up for the newsletter and the download button appeared but it just hangs there and I can't download the app. How do I download the app?
rayiner 12y ago
If you want a proper external monitor to go with your laptop, invest in something like this: http://www.bhphotovideo.com/c/product/1021217-REG/asus_mb168b_15_6_led_lcd.html http://www.bhphotovideo.com/c/product/1021217-REG/asus_mb168....
- gsands 12y ago
  +1 for linking to the lowest price I can find for it on the web (199 vs Amazon's 266).
leehro 12y ago
This is really interesting technically, a couple tidbits I dug up looking in the mac app bundle: 1. There are a couple of OpenGL shaders in the bundle for converting the screen image to HDTV color space/format (420v.fgsh) and some kind of passthrough. 2. They appear to be using x264 to encode the screen with defaults of 1280x720, 1000kbit, superfast preset. (Defaults.plist) So on the mac side, they're definitely capturing the screen and sending a streaming video. Not surprising, but the curious part is how they manage to get the iPad to stream in that data over USB. I suppose something like HTTP Live Streaming[1] could work. Place small files into the device's Documents area, and they get streamed. It would be awesome if something else was going on here - like a named pipe. 1. https://developer.apple.com/streaming/ https://developer.apple.com/streaming/
- spdustin 12y ago
  My guess is it's using Apple's version of RNDIS ... iPad becomes a network peer of the Mac and streams video over that network. But I don't believe that API is public, so I can't know for sure...
some1else 12y ago
Screen emulation: iDisplay: http://www.getidisplay.com/ http://www.getidisplay.com/ AirDisplay: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ iDevice preview: LiveView: http://www.zambetti.com/projects/liveview/ http://www.zambetti.com/projects/liveview/ Skala (Pre)view: http://bjango.com/mac/skalapreview/ http://bjango.com/mac/skalapreview/
elyrly 12y ago
I'm happy this application made its way onto Hacker News. First heard it from a founding team member and thought the use-case is immense.
tluyben2 12y ago
I have been testing this as well; it is really great for travelling. I put my air 2 on high res and find myself hardly using my normal screen anymore. There are a few bugs but those will be gone soon I reckon; the creators respond fast to mail.
DaveSapien 12y ago
is it out yet?
DaveSapien 12y ago
is it out yet?
larryy 12y ago
So where is it?!? It's the 16th and nowhere to be seen. BusinessInsider.com is now saying the 17th. I also wonder why they removed the Mac app from duetdisplay.com.
sathomasga 12y ago
Well, the app is obviously working for some folks, but in my case it's junk. 13" MBA 2012 OS X 10.10.1 connecting with iPad Mini Retina or iPhone 5s (both iOS 8.1.2) using genuine Apple Lightning cable and direction connection (i.e. no USB hub). Most of the time the iOS app never gets beyond the "Connect to Mac" stage, even though the screen flashes on the Mac indicating new display hardware is available. Sometimes the iOS app gets to the "Launching Duet…" and hangs. Rarely, the iOS app actually becomes a display; however, when that happens my mouse is frozen (in a "stuttering" sort of way). Waste of good money for me.

182 points by bauerpl 12y ago

This looks cool - I'd definitely use it for emails. Has it not been done already though? I have a question about the image - whats the stand used for the iPad?

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simi_ 12y ago
https://www.twelvesouth.com/product/compass2 https://www.twelvesouth.com/product/compass2 12 south are pretty nice, but my wife had a bad experience with their SurfacePad iPhone case (really awesome case, but the leather wears heavily after 1-2 months)
- jrockway 12y ago
  Isn't the point of leather that it wears?
andystanton 12y ago
Regarding it being done before, I tried this app (http://minidisplayapp.com/userguide/en/ http://minidisplayapp.com/userguide/en/) that offered similar with an iPad mini, but the extra space wasn't really big enough to make it worthwhile.

PinguTS 12y ago

It is called AirDisplay and available since years: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ I think there was/is also another App available doing it.

petertheface 12y ago
There are plenty of apps which have done this before - but only over Wifi. This is wired, so you don't get the same issues with lag.
shadowmint 12y ago
...and then yosemite came out, the the fps dropped from 25 to 2, and everyone stopped using it. The same goes for DisplayPad. The key here is that this is not a wifi streamcast.
hinkley 12y ago
I've used Air Display, but that's over Wifi. These guys claim to be using the lightning cable. Which means maybe, just maybe, I can plug two of them in at once.

drinchev 12y ago

I wonder how they achieve "Zero lag". I've been using similar software ( AirDisplay [1] ) and the lagging is awful. You have to be certified hardware manufacturer if you want to use the USB connection to transmit any data between the iPad and your Mac [2]. So my bet is they either use WiFi ( which can roughly get 60fps on retina resolution ) or Bluetooth 4. In both cases I think the refresh rate would not satisfy in a lot of cases, e.g. playing a YouTube video through their software on the iPad. 1: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ 2: https://avatron.com/support/faq-air-display/#toggle-id-13 https://avatron.com/support/faq-air-display/#toggle-id-13 EDIT: I've found more information on their facebook page [3] > To setup, download and open duet on your Mac (for free) and on iOS. > Connect your device using a lightning or 30 pin cable. Done. > No need to worry about firewall settings, Wi-Fi speed or your 802.11n network. > Duet is secure, simple, and allows you to use your iOS and OS X devices in harmony. So I guess I was wrong with my bets. Maybe they got a hardware manufacturer license from Apple. Anyway launch is on 16th, so let's see. 3: https://www.facebook.com/duetdisplay/info?tab=page_info https://www.facebook.com/duetdisplay/info?tab=page_info

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darylteo 12y ago
http://www.businessinsider.com.au/duet-display-app-turns-ipad-into-second-screen-2014-12 http://www.businessinsider.com.au/duet-display-app-turns-ipa... Has a review
- fuzzywalrus 12y ago
  "Most importantly, Duet Display is the first app that actually turns your iPad into a second display I’d actually like to use. As someone who has tried Air Display and uninstalled it shortly afterward, frustrated, I can honestly say this is the only option that’s worth it." Interesting, I tried Air Display and (another app) ages ago and used it off and on. It was "neat" and worked well as my Terminal window but a very poor stand for a monitor. Looks like I'll be dusting off my iPad 2.
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furyg3 12y ago

If it is really real-time this will be interesting. In combination with SideCar you could have a nice mobile dual-screen setup. http://www.cultofmac.com/247700/sidecar-hangs-your-ipad-from-your-macbook-screen/ http://www.cultofmac.com/247700/sidecar-hangs-your-ipad-from...

RBerenguel 12y ago

I've occasionally used AirDisplay when doing minor HTML/CSS stuff (browser on iPad, emacs with impatient-mode on Mac) and it's useful, nice, but when doing heavier lifting lag kills it. I'll definitely be getting it tomorrow, and look forward seeing if I get to use it more or "as often as I did."

darylteo 12y ago

Wonder how much bandwidth is required to drive this... My USB3.0 port is taken by an SSD hosting virtual machines, the other is hooked to a powered hub.

dan1234 12y ago
Assuming the video stream is compressed (MP4?) it shouldn't take too much. We're pretty used to streaming HD over the internet, so even USB2 should be able to handle it.

blaze33 12y ago

> the first app that allows you to use your iDevice as an extra display for your Mac I stumbled upon iDisplay.com the other day. Can't recommend anything though, I'm not an apple user, I was looking for ways to replicate my android phone display in my desktop Linux.

teddythetwig 12y ago
Did you find anything worth using for your use case?
- blaze33 12y ago
  Not really: I tried android-screencast [1] but had to root my phone, the framerate was terrible, lots of crashes, touch gestures not really satisfying. The other option was using genymotion, works well, but some apps can't be installed multiple times (whatsapp I'm looking at you). If anyone knows a better way to do so, thank you in advance! [1] https://code.google.com/p/androidscreencast/ https://code.google.com/p/androidscreencast/
  - ledneb 12y ago
    For a little bit I was using a Nexus 10 as a secondary display - I used Google Chrome's remote desktop to view a separate X session, with Synergy for sharing my input devices between them (which is now paid for?!). Worked great, except you couldn't see the mouse cursor on the Nexus... :( Ultimately it was more annoying than helpful. (Edit: just realised that's broadcasting in the opposite direction to what you're asking for)
  - alexhektor 12y ago
    http://web.airdroid.com/ http://web.airdroid.com/ maybe? Lots of drawbacks, though, and not 1:1 mirroring I believe, so may not fit your needs. But seems to support whatsapp via screen mirroring + custom keyboard (probably?). Haven't tested since I'm currently on iOS.
  - ibrahima 12y ago
    Koush's Mirror app[1] works alright with his Allcast Receiver Chrome app. The interesting thing is that using it actually revealed a (broken) second screen mode in one of the apps I use, didn't know Android had APIs for that. Perhaps it's intended for Chromecast/Miracast and whatever Mirror does looks like that. [1] https://play.google.com/store/apps/details?id=com.koushikdutta.mirror&hl=en https://play.google.com/store/apps/details?id=com.koushikdut...

wodenokoto 12y ago

The iAccessories pictured looks really beautiful. Anyone know what brand it is?

ashaiber 12y ago
Amusingly, these are sold by Evernote: https://www.evernote.com/market/feature/pfeiffer https://www.evernote.com/market/feature/pfeiffer
xmr 12y ago
If you like these you may also like Grovemade - http://grovemade.com http://grovemade.com. Initially I even thought it was from them.

edcastro 12y ago

Am I a little too slow here or they just launched the Mac app without the iOS counterpart? Can't find it on App Store.

cstuder 12y ago
You're too fast, the release date for the iOS app is 16th december.
- edcastro 12y ago
  Ah. I see. Got a little confused because the Mac app is already available, so I thought it was just a matter of old sign up form not removed from site yet.
- memeplex 12y ago
  Duet is still waiting in line for approval in the app store. Launch is later this week.
alexcroox 12y ago
The CTA at the end is to sign up for a launch email so I guess it's not ready yet.

patman81 12y ago

I would love to use this to share my Macbook screen on an iPad with a client. One screen seems to small for more than two people to share. Perhaps I could even connect multiple iPads for small presentations without a projector. All running in mirror mode.

Doctor_Fegg 12y ago

Best part of this: "All iPads." My iPad 1 is pretty much a paperweight these days (I know, I know, never buy the first version of anything Apple). This could be a great new use for it.

happyscrappy 12y ago
Seriously. I was going to give away my first gen ipad but due to being so outdated it seemed more of an imposition than a gift.
- dagw 12y ago
  What's wrong with it? I have a first gen iPad and it still works fine. In fact I almost wish it would die already so that I would have a valid excuse to buy a new one.
  - happyscrappy 12y ago
    Most kids games won't run on it.
    - dagw 12y ago
      Mine is full of kids games. Admittedly I've run across one or two games that didn't work, but it's not like I've ever experienced a lack of available kids games.
      - happyscrappy 12y ago
        Thanks, I will have to try it again.
  - oneeyedpigeon 12y ago
    Did you upgrade iOS to version 5? I did, and it's never been the same since. I can now barely use the web browser without it crashing. Some domains are totally unusable; appears to be related to javascript use. Low-impact sites, such as HN, are OK. Other apps (such as the app store and many games) are very prone to crashing, too. There's very little I can use it for now without getting frustrated and giving up.

MagicWishMonkey 12y ago

It would be neat if they could figure out a way to let you use an iMac screen as a secondary monitor for a mbp.

eurleif 12y ago
This is already built-in: http://support.apple.com/kb/PH14264 http://support.apple.com/kb/PH14264
- MagicWishMonkey 12y ago
  Woah, do you know if this works with the new retina display iMacs?
  - michas 12y ago
    Probably not, as current Thunderbolt port is too slow to transmit enough data to drive 5k monitor.
  - eddieroger 12y ago
    At the risk of answering without a guaranteed answer, "probably not," given the amount of the power necessary to drive that screen and complex architecture inside the box to make it work. But Target Display Mode as a thing has been around for a while.
  - mkhalil 12y ago
    I'm here to confirm to you that it doesn't. Sorry buddy, wish it did myself. 5K is out of reach for most MBP's (if not all).
    - MagicWishMonkey 12y ago
      That's a bummer, it would be worth buying a new iMac for the screen alone.
  - stevep98 12y ago
    No, sorry to disappoint you! http://support.apple.com/en-us/HT3924 http://support.apple.com/en-us/HT3924

Cthulhu_ 12y ago

So uh, why is the marketing being done today when the release is tomorrow? I'll probably have forgotten about it by then. I wouldn't mind it though, the other ones (using wifi streaming) never really worked for me. And I wonder why this isn't a default feature in iOS / OSX.

petercooper 12y ago
So uh, why is the marketing being done today when the release is tomorrow? They want your email, Twitter following, and other things that are more useful over time than your casual perusal after launch.
- memeplex 12y ago
  Actually a bit simpler, Business Insider released the article to fill their timeline not Duet's launch date. The app is still awaiting review and with the app store being so busy this season it's hard to give a hard date. Expected to be released later this week.

petercooper 12y ago

Duet is the first app that allows you to use your iDevice as an extra display for your Mac. What am I missing about this sentence that seems to make "the first" false in the face of things like Air Display?

hboon 12y ago
It's tethered using lightning cable.

DanielShir 12y ago

Finally, something to do with my 1st generation iPad.

NietTim 12y ago
You could have used Air Display :) I do really like this use though, never thought of using my old iPad as a permanent extra display.

NietTim 12y ago

I've been using Air Display for a long time for when I'm on the go. Does anybody have experience with both and which is better? Never really had problems with Air Display - if you don't expect it to work as a full external display. However lag has always been very manageable for me

darylteo 12y ago
Product launches tomorrow, so hardly any comparisons can be made. It seems to be promising - wired connection means higher bandwidth and improved latency. Supposedly can do Retina resolutions at 60hz.
- NietTim 12y ago
  I see now, I should have been reading better - my bad. I also read in this thread that Air Display had some troubles with Yosemite, but I haven't updated on my work machine yet so I hadn't seen these problems. Streaming over USB seems promising though, I needed to plug in my iPad for the battery.

RankingMember 12y ago

Anything like this available for Windows? Wouldn't be bad for an email/IM screen.

tmuir 12y ago
Any VNC app allows you to view and control your screen. I like RealVNC. The corresponding app on Android and iOS is called VNC Viewer. There are several companies/projects that offer this functionality.
- RankingMember 12y ago
  I meant adding the iPad as an additional screen (with additional desktop space) for a Windows machine.

maaaats 12y ago

Do I need an iDevice to view the video as well? Wont play here, would be interested to see more how this works.

paraserv 12y ago
You don't need an iOS device to watch the website's ad. It's an embedded YouTube video. Here's the direct link: https://www.youtube.com/watch?v=mVYimOiEya8 https://www.youtube.com/watch?v=mVYimOiEya8

mark_l_watson 12y ago

Wrong. I have been using my iPad as an extra display for my MacBook Air for about 2 1/2 years using the AirDisplay (getairdisplay.com). It is odd that this company would place a large lie as the first readable text.

sigjuice 12y ago
You did not read the whole sentence. Duet is the first app that allows you to use your iDevice as an extra display for your Mac using the Lightning or 30-pin cable. This app uses a cable. All the other apps use wifi.
- mattdw 12y ago
  They have obviously changed the copy in the last few hours. The second half of that sentence ("Using…") was not there earlier.
  - sigjuice 12y ago
    You are right. My apologies. https://web.archive.org/web/20141215154238/http://www.duetdisplay.com/ https://web.archive.org/web/20141215154238/http://www.duetdi...

ripitrust 12y ago

I've actually just downloaded their MacOS App and tried to install and launch it. It now basically does nothing just blinking in the statues bar. But I observe sudden CPU usage surge of this app from the activity monitor, not sure whether it is because of not pairing an iOS app or not And also, my chrome feels significantly lagged.

igrekel 12y ago
mhm in my case once I opened the App it just disappeared. It moved itself to the Application directory, can't say I like this.
- ripitrust 12y ago
  will it slow something down?

alexggordon 12y ago

I've been beta testing duet for about a month now. As a person that travels a lot, it's awesome. The developers have done an incredible job, and have been very responsive in fixing the bugs I've reported to them. However, a couple of things to note. Firstly, this is lag free, but still not something you should play videos on. I'm not sure what the framerate is, but I'd be surprised if it's over 30fps. I believe this is probably a result of using USB. Secondly, I never thought I'd say this, but retina is not your friend. On the new iPads, the OS X menu bar is maybe a centimeter tall. Obviously, you can change the resolution, but I like hi-res, and you just see so little when you bump it up (keep in mind the new iPad is only 1024 by 768). The app is the best it can be, but what I'd emphasize is that most people should really get a second monitor, if that's what they're looking for. I understand you could save some money, but iPads just don't offer enough real estate. Again, kudos to the devs for doing a great job on the app though.

TazeTSchnitzel 12y ago
They claim 60fps with no lag.
- mistercow 12y ago
  That figure could refer to "typical" usage, where most of the screen doesn't have to update.
cooleyandy 12y ago
This app would be pretty useful when the new bigger iPad comes out.

kelsol 12y ago

Fantastic! Been wanting this for, like, ever

jscheel 12y ago

I know this is nit-picky, but Duet is not "the first app that allows you to use your iDevice as an extra display". It's not even the second. There's an opportunity here for better copy to differentiate themselves. Also, I've always thought this would reduce the life of your ipad. Has anyone noticed this?

knd775 12y ago
How? Like the display burning out or something? Maybe something battery related?
- jscheel 12y ago
  Battery is definitely a concern, though it probably doesn't matter since it will be plugged up. The screen dimming might be a concern for me as well. Honestly though, now that I think about it, I've never been worried about that with my laptop, so I probably shouldn't care about it with my ipad.
memeplex 12y ago
you chopped off this part "...iDevice as an extra display for your Mac using the Lightning or 30-pin cable"

aselzer 12y ago

The line "An additional display increases productivity by up to 48%." is particularily funny. I wonder how they "measured" this. A Macbook Air 11" + extra display is quite different from a Macbook Pro 15" + extra display.

bboreham 12y ago
"up to".

shurcooL 12y ago

This isn't the first app that lets you do this, is it? It might be better (or worse) in performance, but the functionality has already been made available in the past, right? Just want to check. Also, this is neat but I wish it were integrated into OS X + iOS as part of AirPlay. I love AirPlay and want to see it expand to cover all possible permutations (iOS -> OS X screen/audio/both sharing, as well as OS X -> iOS screen/audio/both sharing). That would go well under the Continuity moniker and is something Apple can do well thanks to their control. Hopefully it's one of the minor new features in next Apple OS updates.

jakejake 12y ago
I've used an app called Air Display to do the same thing for quite a while, but instead of USB it connects over WiFi - which is convenient, but the refresh rate is slow. I used it mainly to have my chat client on a 3rd screen.

jimmyrocks 12y ago

I'd really like this to work with my old iMac G5. It has a great monitor, but I struggle to find uses for it.

ripitrust 12y ago

OK Guys After I installed and launched this MacOS app , it drastically slowed down my chrome and increased the chrome cpu usage. I am guessing something wrong with the duet app display driver. so if anyone having the same problem like mine, please go to finder, search for "duetdisplay.kext" kernal extension, delete it and reboot your Mac. It should go back to normal.

Kluny 12y ago

Here's the bit I was looking for: http://www.duetdisplay.com/#compatibility http://www.duetdisplay.com/#compatibility Compatible with all iPads, nice! I have an old iPad 1 lying around that runs very few of the apps I would like to use with it (Office suite and VLC, mostly), so I've been looking for a way to repurpose it, and this might be it.

metanoia 12y ago
Looks like they changed it to "All iPad hardware with iOS 6 and above". Which means no iPad 1. :(

iamhenry 12y ago

I signed up for the newsletter and the download button appeared but it just hangs there and I can't download the app. How do I download the app?

rayiner 12y ago

If you want a proper external monitor to go with your laptop, invest in something like this: http://www.bhphotovideo.com/c/product/1021217-REG/asus_mb168b_15_6_led_lcd.html http://www.bhphotovideo.com/c/product/1021217-REG/asus_mb168....

gsands 12y ago
+1 for linking to the lowest price I can find for it on the web (199 vs Amazon's 266).

leehro 12y ago

This is really interesting technically, a couple tidbits I dug up looking in the mac app bundle: 1. There are a couple of OpenGL shaders in the bundle for converting the screen image to HDTV color space/format (420v.fgsh) and some kind of passthrough. 2. They appear to be using x264 to encode the screen with defaults of 1280x720, 1000kbit, superfast preset. (Defaults.plist) So on the mac side, they're definitely capturing the screen and sending a streaming video. Not surprising, but the curious part is how they manage to get the iPad to stream in that data over USB. I suppose something like HTTP Live Streaming[1] could work. Place small files into the device's Documents area, and they get streamed. It would be awesome if something else was going on here - like a named pipe. 1. https://developer.apple.com/streaming/ https://developer.apple.com/streaming/

spdustin 12y ago
My guess is it's using Apple's version of RNDIS ... iPad becomes a network peer of the Mac and streams video over that network. But I don't believe that API is public, so I can't know for sure...

some1else 12y ago

Screen emulation: iDisplay: http://www.getidisplay.com/ http://www.getidisplay.com/ AirDisplay: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ iDevice preview: LiveView: http://www.zambetti.com/projects/liveview/ http://www.zambetti.com/projects/liveview/ Skala (Pre)view: http://bjango.com/mac/skalapreview/ http://bjango.com/mac/skalapreview/

elyrly 12y ago

I'm happy this application made its way onto Hacker News. First heard it from a founding team member and thought the use-case is immense.

tluyben2 12y ago

I have been testing this as well; it is really great for travelling. I put my air 2 on high res and find myself hardly using my normal screen anymore. There are a few bugs but those will be gone soon I reckon; the creators respond fast to mail.

DaveSapien 12y ago

is it out yet?

DaveSapien 12y ago

is it out yet?

larryy 12y ago

So where is it?!? It's the 16th and nowhere to be seen. BusinessInsider.com is now saying the 17th. I also wonder why they removed the Mac app from duetdisplay.com.

sathomasga 12y ago

Well, the app is obviously working for some folks, but in my case it's junk. 13" MBA 2012 OS X 10.10.1 connecting with iPad Mini Retina or iPhone 5s (both iOS 8.1.2) using genuine Apple Lightning cable and direction connection (i.e. no USB hub). Most of the time the iOS app never gets beyond the "Connect to Mac" stage, even though the screen flashes on the Mac indicating new display hardware is available. Sometimes the iOS app gets to the "Launching Duet…" and hangs. Rarely, the iOS app actually becomes a display; however, when that happens my mouse is frozen (in a "stuttering" sort of way). Waste of good money for me.